Unique Cloud Sea Pen
2026-06-24 00:58:13

Platinum Pen's Final Mount Fuji-Themed Fountain Pen with a Unique Cloud Sea Design

The Unkei Series: A Tribute to Mount Fuji



Platinum Pen Co., based in Tokyo, has unveiled the fourth and final edition of their renowned Fuji Unkei series, titled "Unkai," which translates to "Cloud Sea." This limited-edition fountain pen, set for release in July 2026, draws inspiration from the majestic view of Mount Fuji and the clouds that surround it, encapsulating the serene beauty of a mountain landscape in a single writing instrument.

The Fuji Unkei series was initiated in 2011 to celebrate the launch of the #3776 Century fountain pen, designed to prevent ink from drying out. The series includes three prior collections: the Fuji Shunkei series (2017-2021) and the Fuji Goko series (2011-2016).

Design and Features of the Unkai Pen



The Unkai pen features a design that reflects the breathtaking sight of clouds hovering around Mount Fuji during the early morning hours of autumn and winter, when the sun's rays illuminate the mountainside. The cap and grip of the pen are crafted in hues that evoke this tranquil scene, while the barrel showcases a detailed representation of the cloud sea using a unique combination of lens cutting and machining techniques. This allows the pen to capture the delicate yet dynamic nature of the clouds, allowing each user to experience a piece of this spectacular view every time they write.

  • - Color Combination: A bi-color scheme for the body and cap enhances the pen's aesthetic appeal.
  • - Serial Number: Each pen is individually numbered, ensuring its exclusivity.
  • - Cap Ring: Features an elegant sculpted finish, underscoring the beauty of shadows.
  • - Slip Seal Mechanism: Maintains ink freshness for up to two years, allowing for smooth writing whenever needed.

Moreover, the pen accommodates a large 14K nib adorned with a rhodium finish, available in extra-fine, fine, and medium sizes, guaranteeing a luxurious writing experience.

Special Inclusions



To complement the pen, a special ink called "Fuji no Budouzome" (Fuji Grape Dye) will be provided, alongside a blue-black cartridge. Additionally, each fountain pen will come in an elegant, custom-designed package, perfect for collectors.

The specifications of the Unkai pen include a length of 139.5 mm and a maximum diameter of 15.4 mm, with a standard weight of 20.8 g, making it a comfortable tool for prolonged writing sessions.

Release Details



  • - Launch Date: July 1, 2026
  • - Model Number: PNB-650FU-L#61 Unkai
  • - Retail Price: 71,500 yen (tax included)
  • - Availability: Only 1,500 units will be made available worldwide.

As the grand finale of the Fuji Unkei series, the "Unkai" fountain pen celebrates the uniqueness of Japan's natural beauty, transforming the experience of writing into an adventure through the iconic landscape of Mount Fuji. The Unkai pen is not just a writing tool; it is a piece of art that pays homage to the timeless elegance and splendor of nature itself.


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Topics Consumer Products & Retail)

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